Sillar
n. [地]未固结熔灰岩, 未固结火山凝灰岩
🗣️ 情景例句
Please sit down, Mr. Mark.
请坐吧，马克先生。
What time is the mail delivered on Saturday?
邮件在星期六什么时间被递送？
I'm not sure. Maybe I'll give her some flowers. What about you?
我还不太肯定。也许我送她一些花儿。你呢？